CN209432371U - A kind of hand spiral plugging device - Google Patents
A kind of hand spiral plugging device Download PDFInfo
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- CN209432371U CN209432371U CN201822072881.4U CN201822072881U CN209432371U CN 209432371 U CN209432371 U CN 209432371U CN 201822072881 U CN201822072881 U CN 201822072881U CN 209432371 U CN209432371 U CN 209432371U
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Abstract
The utility model relates to a kind of hand spiral plugging devices.The plugging device, including air inlet plugging mechanism and outlet plugging mechanism, air inlet plugging mechanism are clamped positioning mechanism clamping by air inlet and are located at air inlet of air chamber, and air inlet driving device driving air inlet plug blocks air inlet of air chamber；Outlet plugging mechanism is clamped positioning mechanism clamping by outlet and is located at gas chamber gas outlet, and air driving device driving outlet plug blocks air inlet of air chamber out.Air inlet plugging mechanism and outlet plugging mechanism block intercooler gas chamber, and simple structure and reliable sealing is good；Positioning clamping is carried out using air inlet of air chamber and gas outlet self structure, realizes the fast positioning clamping of air inlet plugging mechanism and outlet plugging mechanism；Air inlet driving device and out air driving device are all made of hand screw drives, easy to operate.Push rod is connect by circlip with plug, and plug and the friction of gas chamber mouth, effective protection gas chamber are prevented；Circlip also has certain amount of floating, can automatic capturing gas chamber nozzle center.
Description
Technical field
The present invention relates to a kind of water to examine tooling, more particularly, to a kind of hand spiral plugging device.
Background technique
It before intercooler factory at present, needs to carry out air-leakage test to intercooler, to use after avoiding intercooler entrucking
Leakage in journey.Intercooler is according to model difference, and configurations, some intercoolers air chamber structures are complicated, traditional water checking device without
Method fast positioning clamping effectively blocks intercooler gas chamber, is unable to satisfy water inspection and requires.In particular for plenum interior circle
Cambered surface depth is excessively shallow, air inlet of air chamber and the biggish intercooler of gas outlet bore, blocks and fills according to common cam internal expansion type
It sets, there is also chock plugs to burst out, and injures the risk of personnel by a crashing object.
Summary of the invention
In order to solve the above problem, the present invention provides that a kind of structure is simple, fast positioning clamping, safe and reliable hand can be achieved
Dynamic formula spiral plugging device.
The technical solution adopted by the present invention is that: a kind of hand spiral plugging device, it is characterised in that: including for blocking
The air inlet plugging mechanism of air inlet of air chamber and outlet plugging mechanism for blocking gas chamber gas outlet, the air inlet plugging mechanism packet
It is stifled to include air inlet clamping positioning mechanism, the air inlet plug for blocking air inlet of air chamber and driving air inlet that clamping is located on gas chamber
Cephalomotor air inlet driving device, the air inlet plug are equipped with the pipe fitting that is connected to external air source, in the air inlet plug
Equipped with the inlet channel for being connected to gas chamber inner cavity and pipe fitting；The air inlet plugging mechanism is clamped positioning mechanism card by air inlet
It connects and is located at air inlet of air chamber, the air inlet driving device driving air inlet plug blocks air inlet of air chamber；
The outlet plugging mechanism includes being clamped the outlet clamping positioning mechanism being located on gas chamber, for blocking gas outlet
Outlet plug and driving outlet block up it is cephalomotor go out air driving device；The outlet plugging mechanism is clamped localization machine by outlet
Structure clamping is located at gas chamber gas outlet, and the driving outlet plug of air driving device out blocks gas chamber gas outlet.
Preferably, air inlet clamping positioning mechanism includes air inlet fixture block, and be fixed on air inlet fixture block the
One air inlet locating piece, the second air inlet locating piece and third air inlet locating piece, the first air inlet locating piece and the second air inlet positioning
The positioning clamping corresponding with the mounting pin of two sides at air inlet of air chamber of open slot on block, the first air inlet locating piece and second into
Boss face cooperation in two sides positions at the inner sidewall and air inlet of air chamber of gas locating piece；The third air inlet locating piece and gas chamber air inlet
The cooperation positioning of the lower end Kou Chu arc surface.
Further, the air inlet driving device includes air inlet plug support frame and air inlet spiral handspike, and the air inlet is stifled
The lower end of head support is fixedly connected with air inlet fixture block, and the upper end of the air inlet plug support frame is fixed with air inlet nut, institute
The one end for stating air inlet spiral handspike passes through air inlet nut and connect with air inlet plug, and the other end is equipped with hand-held air intake lever, the air inlet
The bar portion and air inlet nut thread of spiral handspike cooperate；The hand-held air intake lever is rotated, the air inlet spiral handspike drives air inlet
Plug movement.
Further, the air inlet plug includes air inlet plug locating piece and air inlet plug rubber, the air inlet plug
The upper end of locating piece is fixed with air inlet cover board and air inlet backing plate, and lower end is fixedly connected with air inlet plug rubber upper end, it is described into
The lower end of gas plug rubber is tapered to be cooperated with air inlet of air chamber；The air inlet spiral handspike passes through air inlet cover board and passes through air inlet card
Spring is connect with air inlet backing plate.
Further, the air inlet plug support frame two sides are equipped with air inlet guide groove, the air inlet guiding of two sides
Air inlet guider screw is equipped in slot, the air inlet guider screw passes through air inlet guide groove and connect with air inlet plug.
Preferably, outlet clamping positioning mechanism includes outlet fixture block, and be fixed on outlet fixture block the
One outlet locating piece, the second outlet locating piece, third outlet locating piece and the 4th outlet locating piece, the first outlet locating piece
Open slot corresponding with the mounting pin of side at gas chamber gas outlet positioning clamping, the second outlet locating piece and third outlet are fixed
The cooperation of two sides boss lower surface positions at position block and gas chamber gas outlet, boss at the 4th outlet locating piece and gas chamber gas outlet
Right-angled side faces cooperation positioning afterwards.
Further, the air driving device out includes outlet plug support frame and outlet spiral handspike, and the outlet is stifled
The lower end of head support is fixedly connected by lip block with outlet fixture block, and the upper end of the outlet plug support frame is fixed with
Outlet nut, one end of the outlet spiral handspike pass through outlet nut and connect with outlet plug, and the other end is equipped with hand-held outlet
Bar, the bar portion and outlet nut thread of the outlet spiral handspike cooperate；The hand-held outlet bar is rotated, the outlet spiral pushes away
Bar drives the movement of outlet plug.
Further, the outlet plug includes outlet plug locating piece and outlet plug rubber, the outlet plug
The upper end of locating piece is fixed with out air cover board and out air cushion plate, and lower end is fixedly connected with outlet plug rubber upper end, it is described go out
The lower end of gas plug rubber is tapered to be cooperated with gas chamber gas outlet；The outlet spiral handspike passes through air cover board and passes through outlet card
Spring is connect with air cushion plate out.
The beneficial effect that the present invention obtains is: intercooler gas chamber is blocked by air inlet plugging mechanism and outlet plugging mechanism,
Simple structure and reliable sealing is good；Air inlet plugging mechanism is clamped positioning mechanism clamping by air inlet and is located at air inlet of air chamber,
Outlet plugging mechanism is clamped positioning mechanism clamping by outlet and is located at gas chamber gas outlet, utilizes air inlet of air chamber and gas outlet
Self structure carries out positioning clamping, realizes the fast positioning clamping of air inlet plugging mechanism and outlet plugging mechanism；Air inlet driving dress
It sets and air driving device is all made of hand screw drives out, it is easy to operate.
Air inlet spiral handspike is connect by circlip with air inlet plug, and outlet spiral handspike is connected by circlip and outlet plug
It connects, when air inlet spiral handspike and outlet spiral handspike rotate, air inlet plug and outlet plug do not rotate, and prevent plug and gas chamber gas
The friction of mouth, effective protection gas chamber port；Circlip also has certain amount of floating, can automatic capturing gas chamber nozzle center.
Detailed description of the invention
Fig. 1-2 is the assembling schematic diagram of hand spiral plugging device and intercooler of the invention；
Fig. 3 is the structural schematic diagram of air inlet plugging mechanism；
Fig. 4-5 is the structural schematic diagram at intercooler air inlet of air chamber；
Fig. 6 is the schematic diagram that air inlet plugging mechanism blocks air inlet of air chamber；
Fig. 7 is the connection schematic diagram of air inlet driving device and air inlet plug；
Fig. 8 is the structural schematic diagram of outlet plugging mechanism；
Fig. 9-10 is the structural schematic diagram at intercooler gas chamber gas outlet；
Figure 11 is the schematic diagram that outlet plugging mechanism blocks gas chamber gas outlet；
Figure 12 is the connection schematic diagram for air driving device and outlet plug.
Specific embodiment
The present invention will be further explained in the following with reference to the drawings and specific embodiments.
As shown in Figs. 1-2, a kind of hand spiral plugging device of the invention is detected for blocking the gas chamber of intercooler 1
The air-tightness of intercooler 1.The hand spiral plugging device includes air inlet plugging mechanism 2 and outlet plugging mechanism 3, when closure,
Air inlet plugging mechanism 2 blocks 1 air inlet of air chamber 11 of intercooler, and outlet plugging mechanism 3 blocks 1 gas chamber gas outlet of intercooler
12。
As shown in figure 3, air inlet plugging mechanism 2 includes air inlet clamping positioning mechanism 22, air inlet plug 21 and air inlet driving dress
23 are set, air inlet is clamped positioning mechanism 22 and the whole positioning of air inlet plugging mechanism 2 is connected at 1 air inlet of air chamber 11 of intercooler, into
Air driving device 23 is clamped positioning mechanism 22 with air inlet by air inlet plug support frame 231 and is fixedly connected, air inlet driving device 23
It is connect by air inlet spiral handspike 233 with air inlet plug 21, air inlet driving device 23 drives air inlet plug 21 to block intercooler 1
Air inlet of air chamber 11.The pipe fitting 24 (using 1/4 " pipe fitting) be connected to external air source, outside are equipped on air inlet plug 21
Gas source is connected by tracheae 4 with pipe fitting 24, as shown in connection with fig. 7, is equipped in air inlet plug 21 for being connected in 1 gas chamber of intercooler
The inlet channel 25 of chamber and pipe fitting 24.
In the present embodiment, air inlet be clamped positioning mechanism 22 include air inlet fixture block 220, the first air inlet locating piece 221, second into
Gas locating piece 222 and third air inlet locating piece 223, the first air inlet locating piece 221, the second air inlet locating piece 222 and third air inlet
Locating piece 223 is fixed at the corresponding position of air inlet fixture block 220 by the screw of M3 × 12.In conjunction with shown in Fig. 4-6, first
The mounting pin of two sides at open slot and 1 air inlet of air chamber 11 of intercooler on air inlet locating piece 221 and the second air inlet locating piece 222
111 corresponding positioning clampings, the first air inlet locating piece 221 and 222 inner sidewall of the second air inlet locating piece and 1 gas chamber air inlet of intercooler
The cooperation of two sides boss face 112 positioning at mouth 11, third air inlet locating piece 223 and lower end circular arc at 1 air inlet of air chamber 11 of intercooler
The cooperation positioning of face 113, through the first air inlet locating piece 221, the second air inlet locating piece 222 and third air inlet locating piece 223 in
Corresponding structure cooperation at 1 air inlet of air chamber 11 of cooler, realizes that air inlet plugging mechanism 2 is whole in 1 air inlet of air chamber 11 of intercooler
The positioning and clamping at place, accurate positioning is reliable, and clamping and its conveniently.
In the present embodiment, air inlet driving device 23 includes air inlet plug support frame 231 and air inlet spiral handspike 233, air inlet
The lower end of plug support frame 231 is fixedly connected with air inlet fixture block 220, and the upper end of air inlet plug support frame 231 is fixed with air inlet
Nut 232, one end of air inlet spiral handspike 233 pass through air inlet nut 232 and connect with air inlet plug 21, and the other end is equipped with hand-held
Air intake lever 235, bar portion and the air inlet nut 232 of air inlet spiral handspike 233 are threadedly engaged, and constitute feed screw nut pair；Rotation is hand-held
Air intake lever 235, under the action of feed screw nut pair, air inlet spiral handspike 233 drives air inlet plug 21 to move, and then blocks gas
Room air inlet 11.Air inlet guide groove 2311, the air inlet guide groove 2311 of two sides are equipped in 231 two sides of air inlet plug support frame
It is inside equipped with air inlet guider screw 234, air inlet guider screw 234 passes through air inlet guide groove 2311 and connect with air inlet plug 21, into
When gas plug 21 moves, air inlet guider screw 234 is moved along air inlet guide groove 2311, plays the role of guiding.
As shown in fig. 7, air inlet plug 21 includes air inlet plug locating piece 211 and air inlet plug rubber in the present embodiment
212, the upper end of air inlet plug locating piece 211 is fixed with air inlet cover board 213 and air inlet backing plate 214, air inlet plug by screw
211 lower end of locating piece is fixedly connected with 212 upper end of air inlet plug rubber, and the lower end of air inlet plug rubber 212 is tapered cold in
The cooperation of 1 air inlet of air chamber 11 of device, air inlet of air chamber 11 is sealed up；It is equipped with round recessed in air inlet backing plate 214, is convenient for air inlet spiral shell
Rotation push rod 233 rotates in groove when screwing, and jump-ring slot is designed in 233 lower end of air inlet spiral handspike, and air inlet spiral handspike 233 is worn
Air inlet cover board 213 is crossed to connect by air inlet circlip 215 with air inlet backing plate 214.By air inlet circlip 215 connect, both can guarantee into
When gas 233 rotating down pressing of spiral handspike, air inlet plug 21 is not rotated, and avoids air inlet plug 21 and air inlet of air chamber 11 from rubbing, mill
Gas chamber is damaged, and can make air inlet plug 21 that there is certain amount of floating along central axes, air inlet plug 21 can automatic capturing gas chamber air inlet
11 centers of mouth.
As shown in figure 8, outlet plugging mechanism 3 includes outlet clamping positioning mechanism 32, outlet plug 31 and outlet driving dress
33 are set, outlet is clamped positioning mechanism 32 and the whole positioning of outlet plugging mechanism 3 is connected at 1 gas chamber gas outlet 12 of intercooler, out
Air driving device 33 is clamped positioning mechanism 32 with outlet by outlet plug support frame 331 and is fixedly connected, out air driving device 33
It is connect with outlet plug 31 by outlet spiral handspike 332, air driving device 33 drives the pushing of air inlet plug 31 to block out
1 gas chamber gas outlet 12 of cooler.
In the present embodiment, outlet clamping positioning mechanism 32 goes out including outlet fixture block 320, the first outlet locating piece 321, second
Gas locating piece 322, third outlet locating piece 323 and the 4th outlet locating piece 324.In conjunction with shown in Fig. 9-11, the positioning of the first outlet
The positioning clamping corresponding with the mounting pin 121 of side at 1 gas chamber gas outlet 12 of intercooler of the open slot of block 321, the positioning of the second outlet
The cooperation of two sides boss lower surface 122 positions at block 322 and third outlet locating piece 323 and 1 gas chamber gas outlet 12 of intercooler, and the 4th
The cooperation of 123 side of right angle positions after boss at outlet locating piece 334 and 1 gas chamber gas outlet 12 of intercooler, fixed by the first outlet
Position block 321, the second outlet locating piece 322, third outlet locating piece 323 and the 4th outlet locating piece 324 go out with 1 gas chamber of intercooler
The whole positioning and folder at 1 gas chamber gas outlet 12 of intercooler of outlet plugging mechanism 3 is realized in counter structure cooperation at port 12
Tightly, accurate positioning is reliable, and clamping and its conveniently.
In the present embodiment, air driving device 33 includes outlet plug support frame 331 and outlet spiral handspike 332, outlet out
The lower end of plug support frame 331 is fixedly connected by lip block with outlet fixture block 320, the upper end of outlet plug support frame 331
It is fixed with outlet nut 333, one end of outlet spiral handspike 332 passes through outlet nut 333 and connect with outlet plug 31, another
End is equipped with hand-held outlet bar 334, and bar portion and the outlet nut 333 of outlet spiral handspike 332 are threadedly engaged, and forms feed screw nut
It is secondary；Hand-held outlet bar 334 is rotated, under the action of feed screw nut pair, under outlet spiral handspike 332 drives outlet plug 31 to move
Pressure, blocks gas chamber gas outlet 12.
As shown in figure 12, in the present embodiment, outlet plug 31 includes outlet plug locating piece 311 and outlet plug rubber
312, the upper end of outlet plug locating piece 311 is fixed with out air cover board 313 and out air cushion plate 314, outlet plug locating piece 311
Lower end is fixedly connected with 312 upper end of outlet plug rubber, and the lower end of outlet plug rubber 312 is tapered to be gone out with 1 gas chamber of intercooler
Port 12 cooperates, and blocks gas chamber gas outlet 12；Outlet spiral handspike 332 pass through air cover board 313 by outlet circlip 315 with
Air cushion plate 314 connects out, is connected by outlet circlip 315, and when both can guarantee 332 rotating down pressing of outlet spiral handspike, outlet is stifled
First 31 do not rotate, and avoid outlet plug 31 and air inlet of air chamber 12 from rubbing, wear gas chamber, and outlet plug 31 can be made along axis
Line has certain amount of floating, and outlet plug 31 can 12 center of automatic capturing gas chamber gas outlet.
Air inlet plugging mechanism 2 and outlet plugging mechanism 3 are correctly installed on 1 gas chamber of intercooler, and pass through corresponding plug
After blocking gas chamber mouth, external air source is connected to by tracheae with the pipe fitting 24 on air inlet plug 21, into 1 gas chamber of intercooler
After reaching certain pressure, intercooler 1 is placed in sink, carries out air-leakage test for inflation.
Basic principle and key structural feature of the invention has been shown and described above.The present invention is not by the limit of examples detailed above
System, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It both falls in the range of claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (8)
1. a kind of hand spiral plugging device, it is characterised in that: blocked including the air inlet for blocking air inlet of air chamber (11)
Mechanism (2) and outlet plugging mechanism (3) for blocking gas chamber gas outlet (12), the air inlet plugging mechanism (2) include clamping
Air inlet clamping positioning mechanism (22), the air inlet plug (21) for blocking air inlet of air chamber (11) and the driving being located on gas chamber
The air inlet driving device (23) of air inlet plug (21) movement, the air inlet plug (21) are equipped with the pipe being connected to external air source and connect
Head (24), the interior inlet channel (25) being equipped with for being connected to gas chamber inner cavity and pipe fitting (24) of the air inlet plug (21)；It is described
Air inlet plugging mechanism (2) is located at air inlet of air chamber (11) by air inlet clamping positioning mechanism (22) clamping, and the air inlet is driven
Dynamic device (23) driving air inlet plug (21) blocks air inlet of air chamber (11)；
The outlet plugging mechanism (3) includes being clamped outlet clamping positioning mechanism (32) being located on gas chamber, for blocking gas
What the outlet plug (31) of room gas outlet (12) and driving outlet plug (31) moved goes out air driving device (33)；The sealing gland out
Stifled mechanism (3) are located at gas chamber gas outlet (12) by outlet clamping positioning mechanism (32) clamping, the air driving device out
(33) driving outlet plug (31) blocks gas chamber gas outlet (12).
2. hand spiral plugging device according to claim 1, it is characterised in that: the air inlet is clamped positioning mechanism
(22) include air inlet fixture block (220), and be fixed on air inlet fixture block (220) the first air inlet locating piece (221), second into
Gas locating piece (222) and third air inlet locating piece (223), the first air inlet locating piece (221) and the second air inlet locating piece
(222) the open slot positioning clamping corresponding with mounting pin (111) of two sides at air inlet of air chamber (11) on, first air inlet are fixed
Two sides boss face (112) cooperation is fixed at the inner sidewall and air inlet of air chamber (11) of position block (221) and the second air inlet locating piece (222)
Position；Lower end arc surface (113) cooperation positions at the third air inlet locating piece (223) and air inlet of air chamber (11).
3. hand spiral plugging device according to claim 2, it is characterised in that: air inlet driving device (23) packet
Include air inlet plug support frame (231) and air inlet spiral handspike (233), the lower end of the air inlet plug support frame (231) and air inlet
Fixture block (220) is fixedly connected, and the upper end of the air inlet plug support frame (231) is fixed with air inlet nut (232), the air inlet
One end of spiral handspike (233) passes through air inlet nut (232) and connect with air inlet plug (21), and the other end is equipped with hand-held air intake lever
(235), the bar portion of the air inlet spiral handspike (233) is threadedly engaged with air inlet nut (232)；Rotate the hand-held air intake lever
(235), the air inlet spiral handspike (233) drives air inlet plug (21) movement.
4. hand spiral plugging device according to claim 3, it is characterised in that: the air inlet plug (21) include into
Gas plug locating piece (211) and air inlet plug rubber (212), the upper end of the air inlet plug locating piece (211) be fixed with into
Air cover board (213) and air inlet backing plate (214), lower end are fixedly connected with air inlet plug rubber (212) upper end, the air inlet plug rubber
The lower end of glue (212) is tapered to be cooperated with air inlet of air chamber (11)；The air inlet spiral handspike (233) passes through air inlet cover board
(213) it is connect by air inlet circlip (215) with air inlet backing plate (214).
5. hand spiral plugging device according to claim 3, it is characterised in that: the air inlet plug support frame
(231) two sides are equipped with air inlet guide groove (2311), and air inlet guiding spiral shell is equipped in the air inlet guide groove (2311) of two sides
It follows closely (234), the air inlet guider screw (234) passes through air inlet guide groove (2311) and connect with air inlet plug (21).
6. hand spiral plugging device according to claim 1, it is characterised in that: the outlet is clamped positioning mechanism
(32) include outlet fixture block (320), and be fixed on outlet fixture block (320) the first outlet locating piece (321), second go out
Gas locating piece (322), third outlet locating piece (323) and the 4th outlet locating piece (324), the first outlet locating piece
(321) the positioning clamping corresponding with mounting pin (121) of side at gas chamber gas outlet (12) of open slot, the second outlet positioning
Two sides boss lower surface (122) cooperation positions at block (322) and third outlet locating piece (323) and gas chamber gas outlet (12), institute
State right-angled side faces (123) cooperation positioning after boss at the 4th outlet locating piece (324) and gas chamber gas outlet (12).
7. hand spiral plugging device according to claim 6, it is characterised in that: air driving device (33) packet out
Gas plug support frame (331) and outlet spiral handspike (332) are included, the lower end of the outlet plug support frame (331) passes through branch
Stake pad block is fixedly connected with outlet fixture block (320), and the upper end of the outlet plug support frame (331) is fixed with outlet nut
(333), one end of the outlet spiral handspike (332) passes through outlet nut (333) and connect with outlet plug (31), and the other end is set
There is hand-held outlet bar (334), bar portion and the outlet nut (333) of the outlet spiral handspike (332) are threadedly engaged；Described in rotation
Hand-held outlet bar (334), the outlet spiral handspike (332) drive outlet plug (31) movement.
8. hand spiral plugging device according to claim 7, it is characterised in that: the outlet plug (31) includes
The upper end of gas plug locating piece (311) and outlet plug rubber (312), the outlet plug locating piece (311) is fixed with out
Air cover board (313) and out air cushion plate (314), lower end are fixedly connected with outlet plug rubber (312) upper end, the outlet plug rubber
The lower end of glue (312) is tapered to be cooperated with gas chamber gas outlet (12)；The outlet spiral handspike (332) passes through air cover board
(313) it is connect by outlet circlip (315) with air cushion plate out (314).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822072881.4U CN209432371U (en) | 2018-12-11 | 2018-12-11 | A kind of hand spiral plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822072881.4U CN209432371U (en) | 2018-12-11 | 2018-12-11 | A kind of hand spiral plugging device |
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| Publication Number | Publication Date |
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| CN209432371U true CN209432371U (en) | 2019-09-24 |
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| CN201822072881.4U Active CN209432371U (en) | 2018-12-11 | 2018-12-11 | A kind of hand spiral plugging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489911A (en) * | 2018-12-11 | 2019-03-19 | 东风马勒热系统有限公司 | A kind of hand spiral plugging device |
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2018
- 2018-12-11 CN CN201822072881.4U patent/CN209432371U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489911A (en) * | 2018-12-11 | 2019-03-19 | 东风马勒热系统有限公司 | A kind of hand spiral plugging device |
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